Vale, JG;
Walker, HC;
Springell, R;
Hunter, E;
Perry, RS;
McMorrow, DF;
Boseggia, S;
(2019)
Critical fluctuations in the spin-orbit Mott Insulator Sr₃Ir₂O₇.
Journal of Physics: Condensed Matter
, 31
, Article 185803. 10.1088/1361-648X/ab0471.
![[thumbnail of Vale_2019_J._Phys.__Condens._Matter_31_185803.pdf]](https://discovery.ucl.ac.uk/style/images/fileicons/text.png) |
Text
Vale_2019_J._Phys.__Condens._Matter_31_185803.pdf - Published Version Available under License : See the attached licence file. Download (1MB) |
Abstract
X-ray magnetic critical scattering measurements and specific heat measurements were performed on the perovskite iridate Sr₃Ir₂O₇. We find that the magnetic interactions close to the N´eel temperature T_{N} = 283.4(2) K are threedimensional. This contrasts with previous studies which suggest two-dimensional behaviour like Sr₃IrO₄. Violation of the Harris criterion (dν > 2) means that weak disorder becomes relevant. This leads a rounding of the antiferromagnetic phase transition at T_{N}, and modifies the critical exponents relative to the clean system. Specifically, we determine that the critical behaviour of Sr₃Ir₂O₇ is representative of the diluted 3D Ising universality class.
| Type: | Article |
|---|---|
| Title: | Critical fluctuations in the spin-orbit Mott Insulator Sr₃Ir₂O₇ |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-648X/ab0471 |
| Publisher version: | http://dx.doi.org/10.1088/1361-648X/ab0471 |
| Language: | English |
| Additional information: | © 2019 IOP Publishing Ltd. As the Version of Record of this article is going to be/has been published on a gold open access basis under a CC BY 3.0 licence, this Accepted Manuscript is available for reuse under a CC BY 3.0 licence immediately. |
| Keywords: | Magnetic critical scattering, Iridates, Phase transitions |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10067641 |
Archive Staff Only
 |
View Item |
